Lawmakers are lining up to support the Army's fast-track project to rapidly develop and field an air- and missile-defense system that can be bolted onto the Stryker vehicle, a potential billion-dollar effort to harden ground forces in Europe from Russian threats which service leaders did not formally validate until after the Pentagon submitted its fiscal year 2019 budget to Congress. The House Appropriations Committee, in its mark of the Pentagon's FY-19 spending bill, is recommending funding the Army's $108 million...